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Liquid crystal mixture with low negative dielectric

A negative dielectric and mixture technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of good mutual solubility of liquid crystal and dyes, achieve uniform display effect, good absorbance and dichroic ratio, and improve display contrast. Effect

Active Publication Date: 2010-04-28
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the optimization of various performance parameters of the mixed liquid crystal material is contradictory, mutually restrictive and mutually influencing, the liquid crystal must have an extremely low negative dielectric to reduce energy consumption, and at the same time have a wide operating temperature, a wide viewing angle, high and Uniform contrast, and requires good compatibility between the host liquid crystal and the dye, there are still great difficulties

Method used

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  • Liquid crystal mixture with low negative dielectric
  • Liquid crystal mixture with low negative dielectric
  • Liquid crystal mixture with low negative dielectric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Add mixed violet dye-1 composed of dichroic dye monomers to 100 g of negative host liquid crystals of the present invention to form dye liquid crystals, and the composition ratio is shown in Table 2-1.

[0091] The composition of mixed purple dye-1 (1.6g) is:

[0092] Dichroic dye HB-I: 0.2000g

[0093] Dichroic dye HB-III: 0.8000g

[0094] Dichroic dye HB-IV: 0.6000g

[0095] Table 2-1 Main liquid crystal composition and proportion of Example 1

[0096] Liquid crystal compound (indicated by code)

parts by weight

3AAEMO2

6

3AEMO1

20

4AAEAA3

3

5AAEAA3

3

3AMO2

10

2AMPO2

8

3AMO4

9

5AMO4

9

[0097] Liquid crystal compound (indicated by code)

parts by weight

3AAMO2

7

5AAMO2

6

4AAMO2

7

3AAMO3

6

3AAM1

6

Mix Purple Dye - 1

1.6

[0098] The dye liquid crystal is poured b...

Embodiment 2

[0102] Add mixed blue dye-2 composed of dichroic dye monomers to 100 g of negative host liquid crystals of the present invention to form dye liquid crystals, and the composition ratio is shown in Table 3-1.

[0103] The composition of mixed blue dye-2 (1.9g) is:

[0104] Dichroic dye HB-I: 0.2000g

[0105] Dichroic dye HB-III: 0.2000g

[0106] Dichroic dye HB-IV: 1.5000g

[0107] Table 3-1 Main liquid crystal composition and proportion of Example 2

[0108] Liquid crystal compound (indicated by code)

[0109] The dye liquid crystal was poured between the two substrates of the liquid crystal display for performance testing, and the data are shown in Table 3-2.

[0110] Table 3-2 Performance test data of Example 2

[0111] Test items

[0112] Test items

Embodiment 3

[0114] Add mixed black dye-3 composed of dichroic dye monomers to 100 g of negative host liquid crystals of the present invention to form dye liquid crystals, and the composition ratio is shown in Table 4-1.

[0115] The composition of mixed black dye-3 (2.0g) is:

[0116] Dichroic dye HB-I: 0.4000g,

[0117] Dichroic dye HB-II: 0.7500g,

[0118] Dichroic dye HB-IV: 0.8500g;

[0119] Table 4-1 Main liquid crystal composition and proportion of Example 3

[0120] Liquid crystal compound (indicated by code)

parts by weight

3AAEMO2

8

3AEMO1

13

4AAEAA3

1

5PTM3

3

3AAEN1

5

3PPEN2

4

3AMO2

7

2APMO2

5

3AMPO2

5

[0121] Liquid crystal compound (indicated by code)

parts by weight

3AMO4

8

5AMO4

8

3AW(5)

8

5AAMO2

8

4AAMO2

8

3AAMO3

9

Mixed Black Dye - 3

2.0

...

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Abstract

The invention relates to a liquid crystal mixture for a display, which comprises the following compounds in percentage by weight: 70 to 90 percent of compound in a general formula I, 0 to 20 percent of compound in a general formula II, 5 to 25 percent of compound in a general formula III, 0 to 10 percent of compound in a general formula IV and 1 to 15 percent of compound in a formula V. Through optimal combination and optical proportioning, the anisotropyenergy of the negative dielectric of the liquid crystal mixture reaches -9.5, a clearing point is between 95 and 110DEG C, the driving voltage is very low, the energy consumption can be effectively reduced, and a liquid crystal display (hereinafter referred to as LCD) powered by a battery is powered more durably. The mixture has good intersolubility between monomers, and the solubility of the mixture for dichroic dyes is good; and various single dichroic dyes with different colors can be added to the liquid crystal mixture, so the liquid crystal mixture has good absorbance and dichroic ratio to well realize darker dark state and greatly improve display contrast in the displaying process.

Description

technical field [0001] The invention relates to a liquid crystal mixture used for a liquid crystal element of a display device and a guest-host liquid-crystal composition (guest-host liquid-crystal composition) after adding a dye thereto, especially a liquid crystal mixture with extremely low negative dielectric and its composition after adding a dye Guest-host liquid crystal composition. Background technique [0002] Liquid crystal material is a liquid crystal phase between solid phase and liquid phase. Its phase state can be roughly divided into nematic phase, smectic phase and cholesteric phase. In display elements, the application of nematic phase is the most widely. Due to its inherent optical anisotropy (Δn) and dielectric anisotropy (Δε) characteristics, liquid crystal mixtures have been widely used in electronic computers, various measuring instruments, automotive dashboards, electronic notebooks, mobile phones, The production of liquid crystal display components f...

Claims

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Application Information

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IPC IPC(8): C09K19/30C09K19/46C09K19/12C09K19/18C09K19/20C09K19/32C09K19/60
Inventor 谭玉东雷艳蓉马德文胡彪朱霞韩文明阮群奇张宏伟靳灿辉孙仲猛
Owner JIANGSU HECHENG DISPLAY TECHCO
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